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Set up webhooks at cloud.browser-use.com/settings?tab=webhooks.

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Events

EventWhen
agent.task.status_updateTask started, finished, or stopped
testWebhook test ping

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Payload

{
  "type": "agent.task.status_update",
  "timestamp": "2025-01-15T10:30:00Z",
  "payload": {
    "taskId": "task_abc123",
    "status": "finished",
    "sessionId": "session_xyz"
  }
}
Possible status values: started, finished, stopped.

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Signature verification

Every webhook includes an X-Webhook-Signature header. Verify it to ensure the request is authentic. 
import hashlib
import hmac

def verify_webhook(payload: bytes, signature: str, secret: str) -> bool:
    expected = hmac.new(secret.encode(), payload, hashlib.sha256).hexdigest()
    return hmac.compare_digest(expected, signature)

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Example: Express webhook handler

import express from "express";
import { createHmac, timingSafeEqual } from "crypto";

const app = express();
app.use(express.raw({ type: "application/json" }));

const WEBHOOK_SECRET = process.env.WEBHOOK_SECRET!;

app.post("/webhook", (req, res) => {
  const signature = req.headers["x-webhook-signature"] as string;
  const expected = createHmac("sha256", WEBHOOK_SECRET).update(req.body).digest("hex");

  if (!timingSafeEqual(Buffer.from(expected), Buffer.from(signature))) {
    return res.status(401).send("Invalid signature");
  }

  const event = JSON.parse(req.body.toString());

  if (event.type === "agent.task.status_update") {
    const { taskId, status, sessionId } = event.payload;
    console.log(`Task ${taskId} is now ${status}`);
  }

  res.status(200).send("OK");
});

app.listen(3000);

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Example: FastAPI webhook handler

from fastapi import FastAPI, Request, HTTPException
import hashlib
import hmac
import os

app = FastAPI()

WEBHOOK_SECRET = os.environ["WEBHOOK_SECRET"]

@app.post("/webhook")
async def handle_webhook(request: Request):
    body = await request.body()
    signature = request.headers.get("x-webhook-signature", "")
    expected = hmac.new(WEBHOOK_SECRET.encode(), body, hashlib.sha256).hexdigest()

    if not hmac.compare_digest(expected, signature):
        raise HTTPException(status_code=401, detail="Invalid signature")

    event = await request.json()

    if event["type"] == "agent.task.status_update":
        task_id = event["payload"]["taskId"]
        status = event["payload"]["status"]
        print(f"Task {task_id} is now {status}")

    return {"status": "ok"}
For local development, use a tunneling tool like ngrok to expose your local server: ngrok http 3000. Then set the ngrok URL as your webhook endpoint in the dashboard.